JL Audio MX500/4 Marine and Powersports Amplifier 4 Channel
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JL Audio MX500/4 Premium Marine & Powersports 4-Channel Amplifier
Nearly Double the Power. Same Go-Anywhere Footprint.
Need more volume to overcome roaring wind, engine hum, and open-water noise? The JL Audio MX500/4 takes everything that makes the MX series legendary and cranks it to eleven. This heavy-duty, 4-channel Class-D powerhouse serves up a massive 500 Watts of total audio output while remaining small enough to mount inside tight equipment lockers, small center consoles, under-seat compartments, or custom 4WD canopy builds.
Measuring just 237 mm wide, it slips easily into spaces where traditional 500-watt amplifiers would never fit, making it the ultimate power upgrade for demanding marine and off-road applications.
Proprietary NexD™ Switching Technology
When you are away from the dock or miles out on the trail, managing your electrical draw is critical. The MX500/4 utilizes JL Audio’s advanced NexD™ high-speed switching design. This engineering marvel extracts peak power efficiency from your 12V electrical system, reducing heat generation and current draw while delivering pristine, studio-quality sound directly to your marine speakers.
Key Features & Benefits
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Submersible IPX7 Waterproof Rating: Built to survive the rowdiest conditions. The cast-aluminum chassis is entirely dust-tight and rated to withstand temporary submersion in water up to 1 meter deep.
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Massive Configuration Flexibility: Adapt your system effortlessly. Use it as a high-octane 4-channel amp (70W x 4 @ 4$\Omega$), bridge it into a 2-channel system to drive massive wake tower speakers with 250W x 2, or run a 3-channel setup powering your main cockpit speakers plus a dedicated marine subwoofer.
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Dual-Range Differential-Balanced Inputs: Rejects electrical hums and alternator whine before they reach your ears. The smart input section handles everything from standard line-level RCA signals up to high-power factory speaker lines.
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Onboard Bass Boost EQ: Give your music a punchy, low-end edge. Features a variable onboard Bass Boost control adding up to +12dB of kick centered at 45Hz.
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Corrosion-Proof Gasketed Controls: All independent front and rear variable crossovers (35 Hz - 300 Hz) are safely hidden behind a sealed, gasketed aluminum security plate to block salt air and moisture.
Power Output Specifications
| Load Configuration | RMS Power @ 14.4V | RMS Power @ 12.5V |
| 4 $\Omega$ Stereo (Per Channel) | 70 Watts RMS x 4 | 55 Watts RMS x 4 |
| 2 $\Omega$ Stereo (Per Channel) | 125 Watts RMS x 4 | 90 Watts RMS x 4 |
| 4 $\Omega$ Bridged (Mono Pairs) | 250 Watts RMS x 2 | 180 Watts RMS x 2 |
Technical Specifications
| Feature | Specification |
| Amplifier Class | Ultra-efficient NexD™ Class D |
| Waterproof Rating | IPX7 (Submersible up to 1 meter) |
| Frequency Response | 20 Hz - 20 kHz (+0, -1dB) |
| Signal-to-Noise Ratio | >88 dB (A-weighted, referred to highest rated power) |
| Crossover Filter Modes | Independent Front/Rear High-Pass or Low-Pass |
| Filter Range / Slope | Variable 35 Hz - 300 Hz / 12 dB/octave |
| Minimum Power/GND Wire | 4 AWG copper wire |
| Fuse Rating | 50 Amp (AFS, AGU, or MaxiFuse™) |
| Dimensions (W x H x D) | 237 mm x 45 mm x 115 mm (9.33" x 1.77" x 4.50") |
| Net Weight | 1.44 kg (3.18 lbs) |
What's In The Box?
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(1) MX500/4 4-Channel Marine Amplifier
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(4) Stainless Steel Self-Tapping Mounting Screws
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Owner’s Manual & Tuning Guide
Installation Pro-Tip: To ensure optimal performance and protect your warranty, the MX500/4 requires a minimum of a 4 AWG marine-grade copper power wire and a dedicated 50A in-line fuse (not included).
Step Up to True Marine Power. Stop letting engine noise drown out your favorite tracks. Add the JL Audio MX500/4 to your cart today and bring high-volume clarity to your next voyage.